var chap_array = new Array(
    ["43 - Vampire Knight",'43/00-cover'],

    ["42 - Bloody Rose",'42/01'],

    ["41 - Artemis",'41/01'],

    ["40 - The Original Sin, Was Held Tightly by These Hands",'40/01'],

    ["Side Story - A Secret I Don't Know",'39.5/00-extra1'],

    ["39",'39/01'],

    ["38",'38/01-02'],

    ["37",'37/01'],

    ["36 - An Impossible Wish",'36/01'],

    ["35",'35/01-02'],

    ["34 - Blood World",'34/01'],

    ["33 - The Lover of a Pure Blood",'33/01'],

    ["32 - A False Impression",'32/01'],

    ["31",'31/01'],

    ["30",'30/01-02'],

    ["29",'29/01'],

    ["28",'28/01'],

    ["27",'27/01'],

    ["26",'26/01'],

    ["25",'25/00'],

    ["24",'24/01'],

    ["23",'23/01'],

    ["22",'22/01'],

    ["21",'21/01'],

    ["20",'20/01'],

    ["19",'19/01'],

    ["18",'18/01'],

    ["17",'17/00'],

    ["16",'16/01'],

    ["15",'15/01'],

    ["14 - 14 + Special",'14/01'],

    ["13 - The One Who Pulls the Trigger",'13/01'],

    ["12",'12/01'],

    ["11",'11/01'],

    ["10",'10/01'],

    ["9 - The Choice they made + Specials",'9/01'],

    ["8 - Unforgivable",'8/01'],

    ["7 - Night Party",'7/01-02'],

    ["6 - Out of Cross Academy",'6/01'],

    ["5 - The Precious Child",'5/01'],

    ["4 - The Promise",'4/01'],

    ["3 - Vampires Within The Vampires",'3/01'],

    ["2 - Zero's Secret",'2/01'],

    ["1 - The Night Class at Cross Academy",'1/01']
);
for (var i=0; i<chap_array.length; i++) {
    document.getElementById('id_chapter_1').options[i] = new Option(chap_array[i][0],chap_array[i][1]);
    if (document.getElementById('id_chapter_2')) {
        document.getElementById('id_chapter_2').options[i] = new Option(chap_array[i][0],chap_array[i][1]);
    }
}